163243553 has 8 divisors (see below), whose sum is σ = 178356576. Its totient is φ = 148176000.

The previous prime is 163243547. The next prime is 163243601. The reversal of 163243553 is 355342361.

163243553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163243553 - 2¹⁰ = 163242529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163243543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3623 + ... + 18428.

It is an arithmetic number, because the mean of its divisors is an integer number (22294572).

Almost surely, 2^163243553 is an apocalyptic number.

It is an amenable number.

163243553 is a deficient number, since it is larger than the sum of its proper divisors (15113023).

163243553 is a wasteful number, since it uses less digits than its factorization.

163243553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22735.

The product of its digits is 32400, while the sum is 32.

The square root of 163243553 is about 12776.6800460840. The cubic root of 163243553 is about 546.5274916296.

The spelling of 163243553 in words is "one hundred sixty-three million, two hundred forty-three thousand, five hundred fifty-three".